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drm/etnaviv: mmuv2: support 40 bit phys address 

MMUv2 supports up to 40 bits of physical address by folding the upper
8 bits into bits [4:11] of the PTE.

Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
This commit is contained in:
Lucas Stach 2018-05-04 11:58:45 +02:00
parent a1fb6f204f
commit 931e97f3af
1 changed files with 4 additions and 1 deletions
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5
drivers/gpu/drm/etnaviv/etnaviv_iommu_v2.c
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@ -87,11 +87,14 @@ static int etnaviv_iommuv2_map(struct etnaviv_iommu_domain *domain,
struct etnaviv_iommuv2_domain *etnaviv_domain =
to_etnaviv_domain(domain);
int mtlb_entry, stlb_entry, ret;
u32 entry = (u32)paddr | MMUv2_PTE_PRESENT;
u32 entry = lower_32_bits(paddr) | MMUv2_PTE_PRESENT;
if (size != SZ_4K)
return -EINVAL;
if (IS_ENABLED(CONFIG_PHYS_ADDR_T_64BIT))
entry |= (upper_32_bits(paddr) & 0xff) << 4;
if (prot & ETNAVIV_PROT_WRITE)
entry |= MMUv2_PTE_WRITEABLE;